Malicious PDF — malware analysis report

Static analysis result for SHA-256 732c0eb14d564730…

MALICIOUS

PDF

92.0 KB Created: 2021-09-09 11:21:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0be865a010b9c9d4479e3bb5f6df0241 SHA-1: dc7a0a0ca1635fba0f5dc086f45584dfb55189be SHA-256: 732c0eb14d5647306f1cf9edbc099768f9c9c68a1a2a8655af306e411adf8da3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with a heuristic identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/161315cf4acdd4---xaporifirizox.pdf In PDF document text
    • http://tavio.su/files/file/pixexevudozepozinita.pdfIn PDF document text
    • https://leanuslab.com/UserFiles/file/tujanixodaposa.pdfIn PDF document text
    • http://zubrcup.by/files/files/34687847224.pdfIn PDF document text
    • http://ventensis.lt/public/ckfinder/userfiles/files/24381462408.pdfIn PDF document text
    • https://suthuytinh.com/app/webroot/uploads/files/21330614689.pdfIn PDF document text
    • https://madhubanindiancuisine.com/nbloom/fckuploads/file/dirawaxunukubekupifidud.pdfIn PDF document text
    • http://oishisushigd.com/uploads/files/33652930608.pdfIn PDF document text
    • https://interconformity.ro/images/file/tasowovovegujazimeti.pdfIn PDF document text
    • https://healthlantern.com/ckeditor/ckfinder/userfiles/files/xesuruxosalomuvefowew.pdfIn PDF document text
    • http://immobilieninvestors.org/userfiles/file/mamogowewelebinez.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/5615214673.pdfIn PDF document text
    • http://e2ingenieros.com/ckfinder/userfiles/files/nugenigexujit.pdfIn PDF document text
    • http://pushgroup.lv/userfiles/files/wofosogit.pdfIn PDF document text
    • http://wine-paraphernalia.com/files/winep/_repo/file/sibazidodo.pdfIn PDF document text
    • http://01host.ru/userfiles/files/zusasup.pdfIn PDF document text
    • https://888nv.ru/userfiles/file/57862738447.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/zabozafedufasov.pdfIn PDF document text
    • http://chaputlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/6782177635.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///34776019194.pdfIn PDF document text
    • http://phupmirpol.pl/userfiles/file/zinoforilarizodi.pdfIn PDF document text
    • https://szelvedojavitasmiskolc.hu/files/files/13824634141.pdfIn PDF document text
    • http://autolavaggiocraparotta.it/userfiles/files/28720674553.pdfIn PDF document text
    • http://biosite.ru/images/news/file/wewilona.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=mobile+suit+gundam+manga+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0A 19576 bytes
SHA-256: d65d028ed53f28ccc4a24ae71cb7f50268c92666d7aac84a04525067a55b38c2
font_01_sfnt_off00013152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13152 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14969 10976 bytes
SHA-256: 834414831587633115127358be90071b50b642d1e1defe4392475715c21624b0